Attachment for making plug bricks



Feb. 6, 1945. I J, B, BL WETT 2,369,101

ATTACHMENT FOR MAKING PLUG BRICKS Filed July 22, 1943 3 Sheets-Sheet l JO/M/BBLEWETT Feb. 6, 1945. BLEW TT 2,369,101

ATTACHMENT FOR MAKING PLUG BRICKS Filed July 22, 1943 s Sheets-:Sheet s Illll! 8 l 28 Sumac/Whoa:

Patented Feb. 6, 1945 ZUNLITEZD E! "ATTACHMENT -:F.OR MAKrNGJPLUG Barons JohnB.Blewett,Wellsville, Ohio, assignor to The "McLainFireBrick Company,"Fittsburghfl'm,

*a'corpo'rationof Delaware V -Application-July 22, 1942., Serial No. 495,724

' *8 Claims. or; 25

The present inventionv relates tot mechanism' for forming expanded holes in injgot mold plug bricks. The primary object of atheinvention is to pro- :vide ;an apparatus to be used in conjunction with the-refractory plug-brickmold @to produce-a refractory plug :brick having an opening in the center thereof which has an enlarged internal area anda reduced. throat portion. 1

A furtherobject -of;the invention is toaprovide an apparatus for producing .a refractory plug I? \brick' adapted :to be received in the bottom "wall :of -aningot mold, whereby theplug brick will be- -come attached to the ingot during stripping,

transportation andnsoaking and when it is necessary to have a refractory base or support for the 4 ingot.

v r A still further objector the invention is to provide an apparatus which will automatically form an opening in the center ofa plug brick, whereby said opening will have 'a-reduoed throat portion after the completed operation.

the opening. former,

of the pivot members :employedczforrasilpporting Figure 10 is a vertical which av portion .oftherefractory clay is removed during the forming voperation,rand, i

Figure 11 is a fragmentary-sectionalryiew a one of the completed plug bricks producedin accordance with; this invention. l 7' In the drawings, wherein .for they-purposev of illustrating the-invention, and-wherein like reference characters will berem-ployed. to designate like parts throughout the same, the reference character lfl will, generally be employed to.,desig- .nate a rotating carrier having openings-i2 there uin for being bolted to a spinner l-head whichis commonly usediin connection with refractory plug brick-molds, and which spinner head is Otherobjects and advantages of the invention will become-apparent duringthe course of the following description of the accompanying drawings wherein:

Figure 1 is a top elevational view of the revolving head which carries th opening forming mechanism, 2 I v v Figure 2 is asid .elevational view illustrating -;in detail .the' arrangement of the presser plate and former operating mechanism,

Figure 3 is a side elevational view taken at right angles to Figure 2 further illustrating in detail the operation of-thet-spresser headgandzformin'g member, v a,

Figure 4 is a vertical cross sectional view taken on line 4-4 of FigureBdQQking-in the direction of the arrows showing th nmanner in which th former is held in its retracted! position, Figure 5 is avertical cross'sectional view similar to Figure 4, illustrating the former inits extended. position,

"Figure fifiis'a-vertical :cross sectional view taken at right angles to Figures 4 and 5, further illustrating the opening former in its extended posiadapted to be rotated butisnot capable .of axial movement. The. spinner head is notvshown-tbr the reason that any 2 suitable means. may bewemployedfor rotating the carrier lfl.

The carrier I0 is substantially circular andwis provided with opposed flattened surfaces M.

separable sections I26 and mare-provided to'yform the carrier and include complementary meeting faces 20 and 22 which are connectedrtoget-herby a transversevshaft 24. a .2

-A series of openings-26 are formedcingcircular spacedrelation in the carrier ;.|El FfOI receiving a series of bolts 28 havin :heads30"which-.limit the downward'movement of the bolts. A circular presser plate 3| .is provided with similar openings for receiving thelower'screw threaded-.,-.ends of the bolts 28, as.at:32 on whichare. threaded bolts 34 to thereby spacethe presser plate-=31 from thecarrierhead l0. Coil springs136-are mounted on the bolts 28 and maintain the presser plate 3!, in spaced relation to the carrier 'lfl.

- Secured to the flattened portions M of "the head I0 is a pair of anglebrackets 38 whichare held in place by bolts 40, whichact as pivots and.

the angle portion -42 of each bracket-issecured to ananglebracketMtby means of boltsMi. 113V.-

in g threaded on the ends thereof nuts .as-Iat 48.

Pivotally attached to the angle brackets iMnzis a pair'of triangular'pivot plates 50 by meansof bolts 52 which extend through openings 54 and areheld therein by meansof set screws 56. The

'pivot'pins 52 are unthreadedg-so'thatthe triana gular plates 50 may freely pivot on Ithetbrackets 44.- The carrier l0 isi cut away aszatiitwallow free movement of the. =pivot-platesx50. 2' I Depending 'from the; presseriplate :3 l seatiidia- I emetically opposite points are pivotblocks'wflihav sectional view 1 of {the y former illustrating-a central bore thereinthrough ing pivot pins 60 which extend through openings 62 (see Fig. 9) in the triangular plates 50 so that the triangular plates llwill rock thereon when the presser plate 3| is raised and lowered against the tension of the coil springs 35. Set screws 64 are carried by the depending pivot blocks'58 to retain the pivot pins 60 in place.

, Each of the triangular plates 50 is provided with openings 66 in one corner thereof, having,

transverse or lateral threaded bores 68 for receiving set screws so that the ends of a connect-- molten metal when poured in the mold, will enter the enlarged area 90 of the plug to cause the plug to be anchored tothe ingot when the cast metal solidifies. When the ingot is removed from the mold, the plug brick is carried on the bottom thereof. It is to be understood that the form of the invention herewith shown and described same and that various: changes in theshape, size ing rod lllmay be anchored therein and held" against lateral movement and against rotating 1 a movement. Secured to the central portion of the connecting bar 10 is an arcuately curved forming plungis to be taken as a preferred embodiment'of the and arrangement of parts may be resorted to without departingfrom the spirit of the invention or, the scope of the subjoined claims. example, by adjusting the bolts 30 to raise or loW- ,er the carrier 3| or adjusting the bolts 46. which For connect brackets42 and 44, and by-using'shims Q between said brackets, or changing the length or 12, the free end of which is beveled as atz'M to terminate in a blunt point 16.- The arcu-' ately curved former 12 is adapted to operate in anofiset opening 18 formed in the presser plate 3| and said opening is of such formation as to v allow the former 12 free movement therethrough when the presser plate 3| is raised and lowered. vThe former mechanism above described is intended to' be used in connection with a'circular mold 80 which is raised and lowered automatically and is provided with a circular tapering openin 82. for receiving a batch of clay 82' to be molded. The mold 80 is also provided with a bottom wall 84 and the top wall is formed by the presser plate 3| whenthe mold 8D is auto or profile of the forming plunger I2, an increase or a decrease of the projectionof the arcuately curved former 12 may be efifected, and will result 'in the enlarged areas 90 being 'made of any different or desired size or formation. I

What is claimed is: 1. For use with a plug brick mold, a carrier adapted to be attached to a spinner head, a presser plate resiliently mounted on the carrier,

a pair of rocking plates pivoted to the carrier and presser plates and a former operably connected tothe rocking plates and adapted to, form a central opening inthe material being molded.

matioally brought up into engagement therewith as shown in Figures 5 and 6.

' When the mold 80 is moved upwardly by means v of automatic mechanism which is believed unnecessary to show or describe, as such mechanisms are used in refractory plugbrick molding machines, the rotating presser plate, 31 rotates oyer'the upper surface of the refractory clay 82 and smooths the same to prevent the formation of holes or other irregularities therein.

Limit blocks '86 are provided on the undersides of the carrier Iflto limit the upward movement of the'presser plate 3|,and the bottom wall of the carrier l0 iscut away as at 88 to allow the free passage of the triangular pivot plates 50 and their connecting bar 10.

2. For use with a plug brick mold, a carrier adapted to be attached to a spinner head, a presser plate resiliently mounted on the carrier and adapted to be engaged by the plug brick mold, links pivotally attached to the carrier and presser plate and a former operably connected to the links adapted to project through the presser plate to form an opening in'the material being molded. v i

3. For use with a plug brick'mold, a carrier adapted to be attachedto a spinner head, a presser plate suspended from the carrier, an arcuately curved former adapted to project through the presser plate and'means for projecting the former through the said presser plate upon the upward movement of the plug brick mold.

in operation, the mold 811 is moved'upwardly and contacts the presser plate 3| which is rotating at a rapid rate of speed with the carrier I'O.

Upon a continued upward travel of the presser plate 3|, as by means of the mold 80,'the triangular plates 50 are rocked on' their pivot pins 52 by means of the pivot pin and pivot block 58 carried by the presser plate 3|. As the triangular pivot plates 50 rock about the pivot 52,in' an upward direction, the former-12 and connecting rod 10 are simultaneouslyrocked so that the former 12 will project through the opening 18 to allow the free blunt end 16 to enter the mass of refractory clay 82 and thereby remove the clay from an enlarged area 90. The point at which the former enters will be reduced or restricted as at 92 and a portion of the removed clay will pass upwardly through a central bore 94 in the arculately curved former 12 which will have been 4. For use' with a plug brick mold, a'carrier adapted to be attached to a spinner head, a

presser plate suspended from thecarrier, an ar cuately curved former supported by the carrier and presser plate andadapted to project through an opening in the presser plate, and meanslsuspended by the presser plate for projecting the former through the presser plate'when the plug brick mold ismoved upwardly into engagement with the said presser plate.

5.'For use with'a plugbrick'mold, a carrier adapted to be attached to a, spinner head, a

presser plate'resi-liently suspended from the carrier, an arcuately curved former pivotally .sup-

portedflby the carrier and'presser plate and adapted to be projected through-an opening in collected through openings 96 in the pointed end thereof. 1

By adjusting the bolts30, the carrier 3] may be raised or lowered to limit the projection of the arcuately curved former 12 to produce en larged areas 90 of different sizesand formations.

The plug brick as shown completed in Figure 11 is formed of refractory clay and is inserted in the bottom wall of an aingot mold so that the ment with the presser plate to project the former through the said presser plate and into the said plug brick mold.

'7. For use with a plug brick mold, a carrier adapted to be attached to a spinner head, a

adapted to be attached to a spinner head, a presser plate suspended from the carrier, spring means for urging the presser plate downwardly,

8. For use with a plug brick mold, a carrier a. pair of rocking triangular shaped plates pivotally attached to the carrier and presser plate, a bar connecting the rocking plates, an arcuately curved former made integral with the connecting bar and adapted to be projected through an opening in the presser plate, and meansv operk able upon the upward movement of the plug brick mold to project the former into the mold centrally thereof.

, JOHN B. BLEWETT. 

